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Weight Loss: Decrease in existing Body weight.
 JoVE Bioengineering

Training Persons with Spinal Cord Injury to Ambulate Using a Powered Exoskeleton

1Department of Veterans Affairs (VA) Rehabilitation Research and Development National Center of Excellence for the Medical Consequences of Spinal Cord Injury, James J. Peters VA Medical Center, 2Department of Veterans Affairs (VA) Spinal Cord Injury Service, James J. Peters VA Medical Center


JoVE 54071

 JoVE In-Press

Analyzing Beneficial Effects of Nutritional Supplements on Intestinal Epithelial Barrier Functions During Experimental Colitis

1Department of Molecular Biomedicine, Center for Research and Advanced Studies of the National Polytechnic Institute, 2Department of Physiology, Biophysics and Neurosciences, Center for Research and Advanced Studies of the National Polytechnic Institute, 3Department of Infectomics and Molecular Pathogenesis, Center for Research and Advanced Studies of the National Polytechnic Institute

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JoVE 55095

 JoVE Medicine

Computerized Dynamic Posturography for Postural Control Assessment in Patients with Intermittent Claudication

1Discipline of Exercise and Sport Science, Faculty of Health Sciences, University of Sydney, 2Department of Sport, Health and Exercise Science, University of Hull, 3Academic Vascular Department, Hull Royal Infirmary, Hull and East Yorkshire Hospitals, 4Department of Vascular Surgery, Addenbrookes Hospital


JoVE 51077

 JoVE Immunology and Infection

A RAPID Method for Blood Processing to Increase the Yield of Plasma Peptide Levels in Human Blood

1Charité Center for Internal Medicine and Dermatology, Division General Internal and Psychosomatic Medicine, Charité Universitätsmedizin Berlin, Campus Benjamin Franklin, 2Department of Internal Medicine, Institute of Neurogastroenterology and Motility, Martin-Luther Hospital, Academic Teaching Institution of Charité Universitätsmedizin Berlin, 3Department of Hepatology and Gastroenterology, Molecular Cancer Research Center (MKFZ), Campus Virchow-Klinikum, Charité-Universitätsmedizin Berlin


JoVE 53959

 JoVE Behavior

Flat-floored Air-lifted Platform: A New Method for Combining Behavior with Microscopy or Electrophysiology on Awake Freely Moving Rodents

1Neuroscience Center, University of Helsinki, 2Neurotar LTD, 3A. I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, 4Laboratory Animal Center, University of Helsinki


JoVE 51869

 Science Education: Essentials of Lab Animal Research

Blood Withdrawal II

JoVE Science Education

Source: Kay Stewart, RVT, RLATG, CMAR; Valerie A. Schroeder, RVT, RLATG. University of Notre Dame, IN

The collection of blood from mice and rats for analysis can be done through a variety of methods. Each method of collection has variations in the type of restraint required, the invasiveness of the procedure, and the necessity of a general anesthetic.1Historically, the use of the retro-orbital sinus cavity has been used, but not without debate. The controversy related to the potential tissue damage,or even blindness,caused by retro-orbital bleeds has led to the development of facial and submandibular vein bleeding methods in mice.Blood collection from the saphenous vein in both mice and rats is another technique that has been developed. These procedures do not require anesthesia and therefore are suitable when the use of anesthetics may confound blood results or other data.

 JoVE Chemistry

CN-GELFrEE - Clear Native Gel-eluted Liquid Fraction Entrapment Electrophoresis

1Departments of Chemistry and Molecular Biosciences, Chemistry of Life Processes Institute, Proteomics Center of Excellence, Robert H. Lurie Comprehensive Cancer Center, Northwestern University, 2Institute of Chemistry, Proteomics Unit, Federal University of Rio de Janeiro, 3Department of Cell Biology, Brazilian Center for Protein Research, Laboratory of Biochemistry and Protein Chemistry, University of Brasilia


JoVE 53597

 Science Education: Essentials of Analytical Chemistry

Internal Standards

JoVE Science Education

Source: Laboratory of Dr. B. Jill Venton - University of Virginia

The goal of many chemical analyses is a quantitative analysis, where the amount of a substance in a sample is determined. In order to accurately calculate the concentration of an unknown from a sample, careful sample preparation is key. Every time a sample is handled or transferred, some of the sample can be lost. There are strategies however, for minimizing sample loss. There are also strategies for coping with sample loss and still making accurate measurements of concentration. To minimize sample loss, the ideal is to minimize the number of sample handling and transfer steps. For example, massing a solid sample directly into a flask that a solution will be made in reduces a transfer step. If it's necessary to transfer from one flask to another and a dilution is being made, then triple rinsing the glassware helps ensure all the sample is transferred. Other strategies are more specific to the sample. For example, samples that adsorb to glass, such as proteins, might better be handled in polypropylene disposable tubes. The tubes are not hydrophilic, so if a small amount of sample is to be pipetted in water, it is best to have already added the water to the tube, so the sample can be pipetted directly into the solve

 JoVE Medicine

Multimodal Quantitative Phase Imaging with Digital Holographic Microscopy Accurately Assesses Intestinal Inflammation and Epithelial Wound Healing

1Department of Medicine B, University Hospital Münster, 2Institute of Palliative Care, University Hospital Münster, 3Biomedical Technology Center, University of Münster, 4Department of Gastroenterology, Klinikum Bielefeld


JoVE 54460

 JoVE Immunology and Infection

Induction of Murine Intestinal Inflammation by Adoptive Transfer of Effector CD4+CD45RBhigh T Cells into Immunodeficient Mice

1Center for Gastrointestinal Biology and Disease, University of North Carolina at Chapel Hill, 2Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, 3Department of Genetics, University of North Carolina at Chapel Hill, 4Curriculum in Genetics and Molecular Biology, University of North Carolina at Chapel Hill


JoVE 52533

 Science Education: Essentials of Organic Chemistry

Preparing Anhydrous Reagents and Equipment

JoVE Science Education

Source: Laboratory of Dr. Dana Lashley - College of William and Mary
Demonstrated by: Timothy Beck and Lucas Arney

Many reactions in organic chemistry are moisture-sensitive and must be carried out under careful exclusion of water. In these cases the reagents have a high affinity to react with water from the atmosphere and if left exposed the desired reaction will not take place or give poor yields, because the reactants are chemically altered. In order to prevent undesired reactions with H2O these reactions have to be carried out under an inert atmosphere. An inert atmosphere is generated by running the reaction under nitrogen gas, or in more sensitive cases, under a noble gas such as argon. Every component in such a reaction must be completely anhydrous, or free of water. This includes all reagents and solvents used as well as all glassware and equipment that will come into contact with the reagents. Extremely water-sensitive reactions must be carried out inside of a glovebox which provides a completely sealed off anhydrous environment to work under via a pair of gloves which protrudes out to one of the sides of the chamber.

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